偉福8051單機實例程式

1、附錄 C C 語言程序清單 LAP2000;軟件實驗一 存儲器塊清零/* #define Buffer 0x3000 */ unsigned char Buffer256;void main() unsigned int index;unsigned char * ptr;ptr = &Buffer; /* 起始地址 */for (index = 0; index <= 255; index+) *ptr+ = 0xff; /* 清 0, 地址加一 */ ;軟件實驗二 二進制到 BCD 碼轉換/* 將 Number 拆為三個 void main()unsigned char Re

2、sult3;unsigned char Number;Number = 234;Result0 = Number / 100;Result1 = (Number % 100) / 10; /*Result2 = Number % 10;/*;軟件實驗三 二進制到 ASCII 碼轉換 /* 將 A 拆為二個 ASCII 碼 ,BCD 碼, 并存入Result 數組 */除以 100, 得百位數 */ 余數除以 10, 得十位數 */ 余數為個位數 */并存入 Result 數組 */unsigned char const ASCIITable16 = "0123456789ABCDEF

3、" /* 定義數字對應的 ASCII 表 */ void main()unsigned char Result2; unsigned char Number;Number = 0x1a;Result0 = ASCIITableNumber / 16; /*Result1 = ASCIITableNumber & 0xf; /*高四位 */ 低四位 */while(1);軟件實驗四 內存塊移動unsigned char Buffer1256;unsigned char Buffer2256;void main()unsigned char * ptr1; unsigned ch

4、ar * ptr2;unsigned int index;ptr1 = &Buffer10;ptr2 = &Buffer20;for (index=0; index <= 255; index+) *ptr2+ = *ptr1+ - 1;軟件實驗五 程序跳轉表 void Func0() void Func1() void Func2() void Func3() void FuncEnter(unsigned char FuncID) switch (FuncID) case 0: Func0(); break;case 1:Func1(); break;case 2:F

5、unc2(); break;case 3:Func3(); break;default: break;void main()FuncEnter(0);FuncEnter(1);FuncEnter(2);FuncEnter(3); ;軟件實驗六 數據排序#define Size 10unsigned char ArraySize= 5,2,1,0,2,3,8,6,5,9;void main ()unsigned char Change;unsigned char index;unsigned char Temp;do Change = 0;for (index = 0; index < (

6、Size-1); index+) if (Arrayindex > Arrayindex+1) Change = 1;Temp = Arrayindex;Arrayindex = Arrayindex+1; Arrayindex+1 = Temp; while (Change);while (1);硬件實驗一 用 74LS245 讀入外部數據 extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);#define CS245 0x8000 unsigned

7、 char b;void main()while (1) b = IN(CS245);b +;硬件實驗二 用 74LS273 擴展 I/O 口 extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);#define CS273 0x8000void main()unsigned char i, b;while(1)b = 1;for (i=0; i<8; i+) OUT(CS273, b);b <<= 1;硬件實驗三 方向燈控制實驗 #def

8、ine CS273 0x8000#define CS245 0xa000#define DelayCounter 4000#define ON 1#define OFF 0 extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v); unsigned char P1Buf;unsigned char Flash; void main()unsigned int FlashCounter;OUT(CS273,0);FlashCounter = DelayCounte

9、r;Flash = 0xff; while (1) OUT(CS273,(IN(CS245) & Flash); FlashCounter-;if (FlashCounter = 0) FlashCounter = DelayCounter;Flash = Flash;硬件實驗四 PWM 轉換電壓實驗/* 輸出 50% (5:5) 占空比 PWM */ /* 輸出 10% (1:9) 占空比 PWM */ /* 輸出 90% (9:1) 占空比 PWM */extern unsigned char IN(unsigned int port); extern void OUT(unsig

10、ned int port, unsigned char v);#define CS273 0x8000void Delay(unsigned char CNT)unsigned char i;while (CNT-) for (i=0; i<50; i+) ;void main()while (1) OUT(CS273,1);Delay(1);OUT(CS273,0);Delay(9);硬件實驗五 8253 計數器實驗#define CONTROL 0x8003#define COUNT0 0x8000#define COUNT1 0x8001#define COUNT2 0x8002e

11、xtern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);unsigned int i,j;void main()OUT(CONTROL, 0x30); /* counter0,16bit,mode 3,binary */ OUT(COUNT0, 0); /* low byte of counter */ OUT(COUNT0, 0); /* high byte of counter */ while(1)OUT(CONTROL, 0x0); /* counter1

12、,16bit,mode 3,binary */ i = IN(COUNT0); /* low byte of counter */i += IN(COUNT0)*256; /* high byte of counter */j = i ;硬件實驗六 8259 外部中斷實驗#define CS273 0x8000 /* 273 輸出地址 */ #define ICW1 0x13/* 單片 8259, 上升沿中斷 , 要寫 ICW4 */ #define ICW2 0x20/* 中斷號為 20H */#define ICW4 0x01/*工作在 8086/88 方式 */#define OCW1

13、0xfe/*只響應 INT0 中斷 */#define CS8259A 0xa000#define CS8259B 0xa001extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);extern void DISABLE(void);extern void ENABLE(void);extern void SETINT(unsigned char NO, unsigned int *ENTER); unsigned char CNT;interrupt IEn

14、ter()CNT+;OUT(CS273, CNT);OUT(CS8259A, 0x20); /*中斷服務程序結束指令 */void IInit()OUT(CS8259A, ICW1);OUT(CS8259B, ICW2);OUT(CS8259B, ICW4);OUT(CS8259B, OCW1);void main()DISABLE(); /* 關閉中斷響應 */IInit();SETINT(ICW2, &IEnter); /*中斷入口地址 */CNT = 0;OUT(CS273, CNT);ENABLE(); /*打開中斷響應 */while (1); /*等待中斷，并計數。 */;

15、硬件實驗七 8253 定時器實驗#define CONTROL 0x8003#define COUNT0 0x8000#define COUNT1 0x8001#define COUNT2 0x8002extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);void main()OUT(CONTROL, 0x36); /* 計數器 0,16 位 , 方式 3, 二進制 */OUT(COUNT0, 10000 % 256); /*計數器低字節(jié) */OUT(COU

16、NT0, 10000 / 256); /*計數器高字節(jié) */OUT(CONTROL, 0x76); /* 計數器 1,16 位,方式 3, 二進制 */OUT(COUNT1, 100 ); /*計數器低字節(jié) */OUT(COUNT1, 0); /*計數器高字節(jié) */while (1) ;硬件實驗八 D/A 轉換實驗#define CS0832 0x8000 extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);unsigned char SinTbl9 =

17、0x00,0x18,0x30,0x46,0x59,0x69,0x75,0x7c,0x7f;void Write0832(unsigned char b)OUT(CS0832,b);/* unsigned char i; */void main()register i;產生鋸齒波 */產生正弦波 */n /2）區(qū)間的波形*/n /2n ）區(qū)間的波形*/n3 n /2）區(qū)間的波形*/n /22 n ）區(qū)間的波形*/while(1)for(i=0; i<16; i+)/*Write0832(i*0x10);for(i=0; i<8; i+)/*Write0832(0x80 + SinTb

18、li); /* (0 for(i=8; i>0; i-)Write0832(0x80 + SinTbli); /* ( for(i=0; i<8; i+)Write0832(0x80 - SinTbli); /* ( for(i=8; i>0; i-)Write0832(0x80 - SinTbli); /* (3;硬件實驗九 A/D 轉換實驗#define CS0809 0x8000 extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);

19、unsigned char Read0809()起動 A/D */ 延時 > 100us */ 讀入結果 */unsigned char i;OUT(CS0809, 0); /* for (i=0; i<0x40; i+) ; /* return(IN(CS0809); /* unsigned char b; void main(void) b = Read0809(); b +;硬件實驗十8255 輸入 /輸出實驗/*方式0, PA PC輸出，PB輸入*/#define mode 0x82#define PortA 0x8000 /* Port A */#define PortB

20、 0x8001 /* Port B */#define PortC 0x8002 /* Port C */#define CAddr 0x8003 /* 控制字地址 */ extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);unsigned char i,buf;void Delay(unsigned int CNT) while (CNT)CNT-;void main()while(1)OUT(CAddr, mode); /*輸出控制字 */*實驗 1：

21、 PortA 輸出 */buf = 0x80;for(i=0; i<8; i+)OUT(PortA, buf); /*輸出到A端口 */buf >>= 1; /*移位 */Delay(0x5000); /*延時 */;/* 實驗 2： PortB 輸入 PortA 輸出 */ buf = IN(PortB); /*讀入 PortB */OUT(PortA, buf); /*輸出到 PortA */Delay(0x8000);#define LEDLen 6#define OUTBIT 0xfe02#define CLK164 0xfe04#define DAT164 0xfe

22、06extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);unsigned char LEDBufLEDLen; /* 顯示緩沖 */ unsigned char const LEDMAP = /* 八段管顯示碼 */ 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71;void Delay(unsigned char CN

23、T)unsigned char i;while (CNT- !=0)for (i=100; i !=0; i-);void DisplayLED()unsigned char i, j, k;unsigned char Pos;unsigned char LED;Pos = 0x20; /*從左邊開始顯示 */for (i = 0; i < LEDLen; i+) OUT(OUTBIT,0); /* 關所有八段管 */LED = LEDBufi;for (j = 0; j < 8; j+) /*送 164 */if (LED & 0x80) OUT(DAT164, 1);e

24、lse OUT(DAT164, 0);OUT(CLK164, 1);OUT(CLK164, 0);LED <<= 1;OUT(OUTBIT, Pos); /*顯示一位八段管 */Delay(1);Pos >>= 1; /* 顯示下一位 */void main()unsigned char i = 0;unsigned char j;while(1) LEDBuf0 = LEDMAP i & 0x0f;LEDBuf1 = LEDMAP(i+1) & 0x0f;LEDBuf2 = LEDMAP(i+2) & 0x0f;LEDBuf3 = LEDMAP

25、(i+3) & 0x0f;LEDBuf4 = LEDMAP(i+4) & 0x0f;LEDBuf5 = LEDMAP(i+5) & 0x0f;i+;for(j=0; j<20; j+)DisplayLED(); /* 延時 */#define LEDLen 6#define IN_KEY 0xfe00#define OUTBIT 0xfe02#define CLK164 0xfe04#define DAT164 0xfe06extern unsigned char IN(unsigned int port);extern void OUT(unsigned int

26、 port, unsigned char v);unsigned char LEDBufLEDLen; /* 顯示緩沖 */ unsigned char const LEDMAP = /* 八段管顯示碼 */ 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71;unsigned char const KeyTable = /*鍵碼定義 */0x16, 0x15, 0x14, 0xff,0x13, 0x12, 0x11, 0x10,0x0d, 0x0c, 0x

27、0b, 0x0a,0x0e, 0x03, 0x06, 0x09,0x0f, 0x02, 0x05, 0x08,0x00, 0x01, 0x04, 0x07;void Delay(unsigned char CNT)unsigned char i;while (CNT- !=0)for (i=100; i !=0; i-);void DisplayLED()unsigned char i, j, k;unsigned char Pos;unsigned char LED;Pos = 0x20; /*從左邊開始顯示 */for (i = 0; i < LEDLen; i+) OUT(OUTB

28、IT,0); /* 關所有八段管 */LED = LEDBufi;for (j = 0; j < 8; j+) /*送 164 */if (LED & 0x80) OUT(DAT164, 1);else OUT(DAT164, 0);OUT(CLK164, 1);OUT(CLK164, 0);LED <<= 1;OUT(OUTBIT, Pos); /*顯示一位八段管 */Delay(1);Pos >>= 1; /* 顯示下一位 */unsigned char TestKey()OUT(OUTBIT, 0); /*輸出線置為 0 */return (IN(I

29、N_KEY) & 0x0f); /*讀入鍵狀態(tài) ( 高四位不用 ) */unsigned char GetKey()unsigned char Pos;unsigned char i;unsigned char j;unsigned char k;i = 6;Pos = 0x20; /* 找出鍵所在列 */do OUT(OUTBIT, Pos);Pos >>= 1;k = IN(IN_KEY) & 0x0f; while (-i != 0) && (k = 0);/* 鍵值 = 列 X 4 + 行 */if (k != 0) i *= 4;if (k

30、 & 2)i += 1;else if (k & 4)i += 2;else if (k & 8)i += 3;OUT(OUTBIT, 0);do Delay(10); while (TestKey(); /*等鍵釋放 */return(KeyTablei); /* 取出鍵碼 */ else return(0xff);void main()LEDBuf0 = 0xff;LEDBuf1 = 0xff;LEDBuf2 = 0xff;LEDBuf3 = 0xff;LEDBuf4 = 0x00;LEDBuf5 = 0x00;while (1) DisplayLED();if (

31、TestKey() LEDBuf5 = LEDMAPGetKey() & 0x0f;#define LEDLen 6#define IN_KEY 0xfe00#define OUTBIT 0xfe02#define CLK164 0xfe04#define DAT164 0xfe06#define CS8251D 0x8000#define CS8251C 0x8001extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);unsigned char

32、LEDBufLEDLen; /* 顯示緩沖 */unsigned char const LEDMAP = /* 八段管顯示碼 */0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71;unsigned char const KeyTable = /*鍵碼定義 */0x16, 0x15, 0x14, 0xff,0x13, 0x12, 0x11, 0x10,0x0d, 0x0c, 0x0b, 0x0a,0x0e, 0x03, 0x06, 0x09,0x0f, 0x0

33、2, 0x05, 0x08,0x00, 0x01, 0x04, 0x07;void Delay(unsigned char CNT) unsigned char i;while (CNT- !=0)for (i=100; i !=0; i-);void DisplayLED()unsigned char i, j, k; unsigned char Pos; unsigned char LED;Pos = 0x20; /*從左邊開始顯示 */for (i = 0; i < LEDLen; i+) OUT(OUTBIT,0); /* 關所有八段管 */LED = LEDBufi;for (

34、j = 0; j < 8; j+) /*送 164 */if (LED & 0x80) OUT(DAT164, 1); else OUT(DAT164, 0);OUT(CLK164, 1);OUT(CLK164, 0);LED <<= 1;OUT(OUTBIT, Pos); /*顯示一位八段管 */Delay(1);Pos >>= 1; /* 顯示下一位 */unsigned char TestKey()OUT(OUTBIT, 0); /*輸出線置為 0 */return (IN(IN_KEY) & 0x0f); /*讀入鍵狀態(tài) ( 高四位不用 )

35、 */unsigned char GetKey()unsigned char Pos;unsigned char i;unsigned char j;unsigned char k;i = 6;Pos = 0x20; /* 找出鍵所在列 */do OUT(OUTBIT, Pos);Pos >>= 1;k = IN(IN_KEY) & 0x0f; while (-i != 0) && (k = 0);/* 鍵值 = 列 X 4 + 行 */if (k != 0) i *= 4;if (k & 2) i += 1;else if (k & 4)

36、i += 2;else if (k & 8) i += 3;OUT(OUTBIT, 0);do Delay(10); while (TestKey(); /*return(KeyTablei); /* else return(0xff);void IInit()OUT(CS8251C,0x4f); /* 1OUT(CS8251C,0x15); /*void Send(unsigned char TBuf)unsigned ss;OUT(CS8251C,0x15);/*while( !(IN(CS8251C) & 0x1); /*OUT(CS8251D,TBuf);/*unsig

37、ned char Receive()while( !(IN(CS8251C) & 0x2); /* return (IN(CS8251D); /* void main()unsigned char RCVBUF;IInit();LEDBuf0 = 0xff;LEDBuf1 = 0xff;LEDBuf2 = 0xff;LEDBuf3 = 0xff;LEDBuf4 = 0x00;LEDBuf5 = 0x00;等鍵釋放 */取出鍵碼 */停止位，無校驗， 8 數據位 */ 清錯誤標志，允許接收發(fā)送 */清錯誤標志，允許接收發(fā)送 */ 發(fā)送緩沖是否為空 */ 送出數據庫 */是否已收到數據 *

38、/ 讀入數據 */while (1) DisplayLED(); /* if(!(IN(CS8251C) & 0x2) /* if (TestKey()/*Send(GetKey();/* elseRCVBUF = Receive(); /*LEDBuf5 = LEDMAPRCVBUF & 0x0f; /*LEDBuf4 = LEDMAPRCVBUF / 0x10; /* 顯示 */是否收到數據 */如果有鍵按下 */ 則用串口輸出 */已收到數據 */ 顯示低 4 位 */ 顯示高 4 位 */;硬件實驗十五 電子琴#define CONTROL 0x8003#define

39、COUNT0 0x8000#define COUNT1 0x8001#define COUNT2 0x8002#define IN_KEY 0xfe00#define OUTBIT 0xfe02extern unsigned char IN(unsigned int port); extern void OUT(unsigned int port, unsigned char v);unsigned int const ToneTable = 2273, 2024, 1805, 1704, 1517, 1353, 1205, 1136;unsigned char const KeyTable

40、= /* 0x16, 0x15, 0x14, 0xff, 0x13, 0x12, 0x11, 0x10, 0x0d, 0x0c, 0x0b, 0x0a, 0x0e, 0x03, 0x06, 0x09, 0x0f, 0x02, 0x05, 0x08, 0x00, 0x01, 0x04, 0x07;unsigned char TestKey()OUT(OUTBIT, 0);/*return (IN(IN_KEY) & 0x0f); /*unsigned char GetKey()unsigned char Pos; unsigned char i;unsigned char j; unsi

41、gned char k;鍵碼定義 */輸出線置為 0 */讀入鍵狀態(tài) （ 高四位不用 ） */i = 6;Pos = 0x20; /* 找出鍵所在列 */ do OUT(OUTBIT, Pos);Pos >>= 1;k = IN(IN_KEY) & 0x0f; while (-i != 0) && (k = 0);/* 鍵值 = 列 X 4 + 行 */if (k != 0) A if (k & 2)i += 1;else if (k & 4)i += 2;else if (k & 8)i += 3;return(KeyTablei)

42、; /* else return(0xff);取出鍵碼 */void Delay(unsigned char CNT) unsigned char i;while (CNT- !=0)for (i=100; i !=0; i-); void OutTone(unsigned int Tone)OUT(CONTROL, 0x36); /* counter0,16bit,mode 3,binary */OUT(COUNT0, Tone % 256); /* low byte of counter */ OUT(COUNT0, Tone / 256); /* high byte of counter

43、 */ void main()unsigned char Key;unsigned int Tone;while (1) while (! TestKey() ; /*等按鍵 */Key = GetKey();if ( (Key >= 1) && (Key <= 8) ) Tone = ToneTableKey-1 ;OutTone(Tone);delay(600);OutTone(2);硬件實驗十六 步進電機控制實驗;硬件實驗十七 空調溫度控制實驗#define LEDLen 6#define ADPort 0x8000 /* AD采樣輸入片選 */#define

44、 CS273 0xa000 /* 控制輸出片選 */#define IN_KEY 0xfe00#define OUTBIT 0xfe02#define CLK164 0xfe04#define DAT164 0xfe06extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);unsigned char LEDBufLEDLen; /* 顯示緩沖 */unsigned char const LEDMAP = /* 八段管顯示碼 */0x3f, 0x06, 0x5b

45、, 0x4f, 0x66, 0x6d, 0x7d, 0x07,0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71;unsigned char const KeyTable = /*鍵碼定義 */0x16, 0x15, 0x14, 0xff,0x13, 0x12, 0x11, 0x10,0x0d, 0x0c, 0x0b, 0x0a,0x0e, 0x03, 0x06, 0x09,0x0f, 0x02, 0x05, 0x08,0x00, 0x01, 0x04, 0x07;void Delay(unsigned char CNT) unsigned char

46、i;while (CNT- !=0)for (i=80; i !=0; i-);void DisplayLED() unsigned char i, j, k; unsigned char Pos; unsigned char LED;Pos = 0x20; /*從左邊開始顯示 */for (i = 0; i < LEDLen; i+) OUT(OUTBIT,0); /* 關所有八段管 */LED = LEDBufi;for (j = 0; j < 8; j+) /*送 164 */if (LED & 0x80) OUT(DAT164, 1); else OUT(DAT16

47、4, 0);OUT(CLK164, 1);OUT(CLK164, 0);LED <<= 1;OUT(OUTBIT, Pos); /*顯示一位八段管 */Delay(1);Pos >>= 1; /* 顯示下一位 */OUT(OUTBIT,0); /* 關所有八段管 */unsigned char TestKey()OUT(OUTBIT, 0); /*輸出線置為 0 */return (IN(IN_KEY) & 0x0f); /*讀入鍵狀態(tài) ( 高四位不用 ) */unsigned char GetKey()unsigned char Pos;unsigned ch

48、ar i;unsigned char j;unsigned char k;i = 6;Pos = 0x20; /* 找出鍵所在列 */ do OUT(OUTBIT, Pos);Pos >>= 1;k = IN(IN_KEY) & 0x0f; while (-i != 0) && (k = 0);/* 鍵值 = 列 X 4 + 行 */if (k != 0) A if (k & 2)i += 1;else if (k & 4)i += 2;else if (k & 8)i += 3;等鍵釋放 */OUT(OUTBIT, 0);do De

49、lay(10); while (TestKey(); /*return(KeyTablei); /* 取出鍵碼 */ else return(0xff);/* =*/ #define UP 0x16#define DOWN 0x15#define ON 1#define OFF 0#define LowLimit 10#define HighLimit 30#define LowTemp (-40) /* A/D 0 */#define HighTemp 50 /* A/D 255*/#define Heat 1#define Cool 2signed char P1Buf;signed ch

50、ar SetTemp, CurTemp;void DisplayResult()signed char T;T = CurTemp;if (T < 0) LEDBuf0 = 0x40;T = - T; else LEDBuf0 = 0;LEDBuf1 = LEDMAPT / 10;LEDBuf2 = LEDMAPT % 10;LEDBuf3 = 0;LEDBuf4 = LEDMAPSetTemp / 10;LEDBuf5 = LEDMAPSetTemp % 10; unsigned char ReadAD()unsigned int i;OUT(ADPort, 0); /* start

51、A/D convert */ for (i=0; i<10; i+) ; /* delay 100us */ return (IN(ADPort);void ReadTemp()unsigned char i;signed int Temp;Temp = 0; for (i=0; i<16; i+) Temp += ReadAD();CurTemp = (Temp/16) * (HighTemp-LowTemp) / 256 + LowTemp; void main() unsigned char Key;P1Buf = 0;SetTemp = 20; while (1) whil

52、e (!TestKey() DisplayResult(); DisplayLED(); ReadTemp();if (CurTemp < (SetTemp - 2) P1Buf |= Heat;P1Buf &= Cool; else if (CurTemp > (SetTemp + 2) P1Buf &= Heat; P1Buf |= Cool; else P1Buf &= Heat;P1Buf &= Cool;OUT(CS273, P1Buf);Key = GetKey();if (Key = DOWN) if (SetTemp > Low

53、Limit) SetTemp-; else if (Key = UP) if (SetTemp < HighLimit) SetTemp+;硬件實驗十八 計算器實驗#define LEDLen 6#define IN_KEY 0xfe00#define OUTBIT 0xfe02#define CLK164 0xfe04#define DAT164 0xfe06extern unsigned char IN(unsigned int port);extern void OUT(unsigned int port, unsigned char v);unsigned char LEDBufLEDLen; /* 顯示緩沖 */ unsigned char const LEDMAP = /* 八段管顯示碼 */ 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0